Furnace.



No. 773,542. PATENTED NOV. 1, 1904. B. H. CASS. FURNACE.

APPLICATION FILED AUG. 11, 1903.

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UNITED STATES Patented November 1, 1904.

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PATENT FURNACE.

SPECIFICATION forming part of Letters Patent No. 773,542, dated. November 1, 1904.

Application filed August 11, 1903.

To a 7071 0112 if m/rry concern:

Be it known that I, BRUou H. Cass, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Furnaces; and I. do hereby declare the following to beafull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to furnaces, and particularly to those known as hot-air furnaces; and some of the objects of the invention are to provide a furnace of this general character which is simple in construction, while being efficient in operation.

Another object of the invention is to conduct the cool air through the furnace by a circuitous route,.whereby the air is thoroughly heated before it is permitted to escape from the furnace.

It is also an object of the invention to increase the heating area of the furnace without increasing the dimensions or size of the furnace proper.

ith these and other objects in view the invention consists, essentially. in the construction, combination, and arrangement of parts substantially as more fully described in the following specification and as illustrated in the accompanying drawings, forming part of this application, in whicl Figure 1 is a rear elevational view of the furnace. Fig. 2 is a front elevational view of the same. Fig. 3 is a longitudinal sectional view of the furnace, Fig. i is a transverse sectional view taken on line 4 4 of Fig. 3. Fig. 5 is a view similar to Fig. 4, taken on line 5 5 of Fig. 3; and Fig. 6 is a top plan view of the furnace.

Similar characters of reference designate corresponding parts throughout the several views.

Referring to the drawings, reference character 1 designates the base or bottom of a furnace to which is suitably connected an exterior jacket or casing 2, upon the other end whereof is secured the top or cover 3, and with the latter are preferably connected suitable pipes or connections 4: and 5, through Serial No. 169,129, We model.)

which the heated air and products of combustion are respectively conducted from the fur nace.

. WVithin the bottom of the furnace is secured a circular disk or casting 6, having suitable legsv or supports 7 and with which is formed or connected a cylinder 8, secured at the opposite end thereof to a ringlike skeleton frame or casting 9, and within the cylinder 8 is secured another cylinder 10, likewise being connected to the disk 6 and ring 9by bolts, rivets, or other suitable means, substantially as illustrated, particularly in Fig. 8 of the drawmgs.

Between the casing 2' and the cylinder 8 and around openings therein are secured short pipes or tubes 11, through which the fresh air passes into the furnace to support combustion, as will be hereinafter more fully explained, and between the cylinders 8 and 10 is arranged an annular partition 12, preferably shorter than said cylinders and supported by means of a ring or casting 13, connected with said partition and with the cylinder 10.

In the center of the furnace is preferably located a pipe or cylinder 14:, desirably closed at the lower end, as shown at 15, and having connections 16 with openings therein and in the cylinder 10, while the upper end of said pipe may be connected with the ring or casting 9, essentially as shown.

Arranged in any suitable manner upon the disk or plate 6 is an annular burner or other ignition device 17, having suitable valve connections 18 with the source of fuel-supply, said connections being preferably provided with a branch 19, communicating with a pilotlight 20 in the usual manner.

In the front of the casing or jacket 2, and preferably above and adjacent to the burner connections, is a-door or similar device 21 to afford access to the burner and pilot-light, while in the opposite side and rear of the easing is preferably formedan opening 22, covered with gauze or other retriculated material, through which opening the air to be heated passes into the furnace in the manner subsequently described.

The operation of the construction hereinbefore described and shown will be readily understood from the foregoing description when taken in connection with the accompanying drawings and the following explanation thereof. Fresh air to be heated enters through the opening 22 and part thereof passes between the pipe 14: and the cylinder 10, out through the openings in the ring 9, and out through the pipes or connections 4 to the place of use, while a portion of the air thus admitted passes beneath the disk or plate 6 and out and up between the casing 2 and the cylinder 8, and the connections 4 being heated during its passage through the furnace by contact with the heated parts of the walls, as will be readily understood. Air is admitted through the ports or pipes 11, through the casing 2 and the cylinder 8, above the burner to support combustion, and the products of combustion pass up between the casing 8 and the partition 12 and return down between said partition and the cylinder 10, through the pipes or ports 16 into the central pipe 14. and out through the pipe 5 to the chimney.

By means of this construction the products of combustion are caused to traverse the en tire surface of the cylinders 8 and and pass up through the central pipe H, thereby heating said parts, and the fresh air is caused to pass over the entire area of the cylinders S and 10 and is heated therefrom before escaping from the furnace.

It is not desired to limit or confine this invention. to the specific construction combination, and arrangement of parts herein shown and described, and the right is reserved to make all such changes in and modifications of the same as come within the spirit and scope of this invention.

1 claim In a hot-air furnace the combination of a casing, an annular combustion-chamber situated therein and spaced therefrom, said chamher being provided With a vertical partition terminating near the top thereof, a centrallylocated heating-drum, spaced from said combustion-ehamber, means for providing communication between the lower end of said heating-drum and the lower end of said combustion-chamber on one side of said partition, and

means for producing combustion on the oppoa site side of said partition, the furnace being provided near its bottom With air-induction ports in communication with the spaces between the casing and the combustion-chamber and between the combustion-chamber and the drum and with air-eduction ports.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, at Los Angeles, in the county of Los Angeles, State of California,

- this 1st day of August, 1903.

BRUCE H. CASS.

l Vitnesses:

ALBERT GRUTCHER, M IGNON FORD. 

